Well i am gonna say one thing here. Do not shorten your wrist bone. It has 2 bones and its hard to get 100% working.
My Mother has Extremely long arms and her mom bully her about it alot. Shes goodlooking woman and she uses different ways to hide her arms. If you ask me she has struggled alot about it. She also has really long legs. Hows your proportion? Long legs? Or long torso? Wondering if lenghtening legs would be a option also?
I have not read about humerus shortening, but in case of uppee legs safety margin is 4cm. I can tell that short humerus bone is not the best asset in life. Its hard sometimes to find a comfortable way of being. But if you really think trough and wanna proceed remember to check all risks and be ready for the worst.